2000-01-24  bertrand  <bertrand@helixcode.com>

	* camel/camel-seekable-stream.c:
	* camel/camel-seekable-stream.h:

	* camel/camel-simple-data-wrapper-stream.h:  parent class is now
	CamelSeekableStream
	* camel/camel-stream-buffered-fs.h: idem
	* camel/camel-stream-buffered-fs.c: idem
	* camel/camel-stream-mem.h: idem
	* camel/camel-stream-mem.c: idem
	(_seek): change declaration
	* camel/camel-stream-fs.c: parent class is now
	CamelSeekableStream
	(_seek): change declaration

	* camel/camel-stream-fs.h: parent class is now
	CamelSeekableStream

Major compatible change in the stream hierarchy.
Removed the seek method from the general streams
so that we can use them as "DataSources".

svn path=/trunk/; revision=1622